<template>
  <el-image
    :preview-src-list="realSrcList"
    :src="`${realSrc}`"
    :style="`width:${realWidth};height:${realHeight};`"
    fit="cover"
    preview-teleported
  >
    <template #error>
      <div class="image-slot">
        <el-icon>
          <picture-filled/>
        </el-icon>
      </div>
    </template>
  </el-image>
</template>

<script lang="ts" setup>
import {computed} from 'vue';
import {PictureFilled} from '@element-plus/icons-vue';

interface ImageViewerProps {
  src: string;
  width?: number | string;
  height?: number | string;
}

const props = withDefaults(defineProps<ImageViewerProps>(), {
  src: "",
  width: "60px",
  height: "60px"
});

// 内联判断是否为外部链接
const isExternalUrl = (path: string): boolean => {
  return /^(https?:|mailto:|tel:)/.test(path);
};

const realSrc = computed(() => {
  if (!props.src) {
    return "";
  }
  const real_src = props.src.split(",")[0];
  if (isExternalUrl(real_src)) {
    return real_src;
  }
  return import.meta.env.VITE_APP_BASE_API + real_src;
});

const realSrcList = computed((): string[] => {
  if (!props.src) {
    return [];
  }
  const real_src_list = props.src.split(",");
  const srcList: string[] = [];
  real_src_list.forEach(item => {
    if (isExternalUrl(item)) {
      srcList.push(item);
    } else {
      srcList.push(import.meta.env.VITE_APP_BASE_API + item);
    }
  });
  return srcList;
});

const realWidth = computed((): string =>
  typeof props.width === "string" ? props.width : `${props.width}px`
);

const realHeight = computed((): string =>
  typeof props.height === "string" ? props.height : `${props.height}px`
);
</script>

<style lang="scss" scoped>
.el-image {
  border-radius: 5px;
  background-color: #ebeef5;
  box-shadow: 0 0 5px 1px #ccc;

  :deep(.el-image__inner) {
    transition: all 0.3s;
    cursor: pointer;

    &:hover {
      transform: scale(1.2);
    }
  }

  :deep(.image-slot) {
    display: flex;
    justify-content: center;
    align-items: center;
    width: 100%;
    height: 100%;
    color: #909399;
    font-size: 30px;
  }
}
</style>
